New York state income tax

This notebook shows how New York’s state income tax, including credits, operates holistically.

Examples

from policyengine_us import IndividualSim
import pandas as pd
import plotly.express as px

LIGHT_GRAY = "#F5F5F5"
GRAY = "#BDBDBD"
BLUE = "#5091cc"
LIGHT_BLUE = "lightblue"
DARK_BLUE = "darkblue"


def make_tax(adults, children):
    sim = IndividualSim(year=2022)
    sim.add_person(name="head", age=25)
    members = ["head"]
    if adults == 2:
        sim.add_person(name="spouse", age=25)
        members += ["spouse"]
    for i in range(children):
        child = "child{}".format(i)
        sim.add_person(name=child, age=6)
        members += [child]
    sim.add_tax_unit(name="tax_unit", members=members, premium_tax_credit=0)
    sim.add_household(name="household", members=members, state_code="NY")
    sim.vary("employment_income", max=100_000, step=100)
    employment_income = sim.calc("employment_income")[0]
    state_income_tax = sim.calc("state_income_tax")[0].round()
    mtr = sim.deriv("state_income_tax", "employment_income", wrt_target="head")
    return pd.DataFrame(
        dict(
            employment_income=employment_income,
            state_income_tax=state_income_tax,
            mtr=mtr,
            adults=adults,
            children=str(children),
        )
    )


# Make a table of state taxes for different numbers of adults and children.
l = []
for adults in range(1, 3):
    for children in range(0, 4):
        l.append(make_tax(adults, children))

df = pd.concat(l)

LABELS = dict(
    employment_income="Employment income",
    state_income_tax="New York income tax",
    mtr="Marginal tax rate",
    adults="Adults",
    children="Children",
)

COLOR_MAP = {"0": GRAY, "1": LIGHT_BLUE, "2": BLUE, "3": DARK_BLUE}

fig = px.line(
    df,
    "employment_income",
    "state_income_tax",
    color="children",
    animation_frame="adults",
    labels=LABELS,
    title="New York state income tax",
    color_discrete_map=COLOR_MAP,
)
fig.update_layout(
    xaxis_tickformat="$,",
    yaxis_tickformat="$,",
    plot_bgcolor="white",
    xaxis_gridcolor=LIGHT_GRAY,
    yaxis_gridcolor=LIGHT_GRAY,
)
fig.show()

Building simulation with reform ()

Building simulation with reform ()

Building simulation with reform ()

Building simulation with reform ()

Building simulation with reform ()

Building simulation with reform ()

Building simulation with reform ()

Building simulation with reform ()

Total marginal tax rates range from -20.3% to +15.3%, excluding cliffs.

fig = px.line(
    df,
    "employment_income",
    "mtr",
    color="children",
    animation_frame="adults",
    labels=LABELS,
    title="Marginal tax rate for a New York household",
    color_discrete_map=COLOR_MAP,
)
fig.update_layout(
    xaxis_tickformat="$,",
    yaxis_tickformat=".1%",
    yaxis_range=[-0.2, 0.2],
    plot_bgcolor="white",
    xaxis_gridcolor=LIGHT_GRAY,
    yaxis_gridcolor=LIGHT_GRAY,
)
fig.show()